|
|
(10 intermediate revisions by the same user not shown) |
Line 1: |
Line 1: |
| __NOTOC__ | | __NOTOC__ |
| =Amazing Grace= | | =Amazing Grace= |
| + | <!-- Start of content --> |
| <div class="post" id="post-180"> | | <div class="post" id="post-180"> |
| | | |
Line 6: |
Line 7: |
| <p>[[File:Diana-Grace.gif|Diana-Grace-LTO]]<br /> | | <p>[[File:Diana-Grace.gif|Diana-Grace-LTO]]<br /> |
| <em>image from [http://www.lpi.usra.edu/resources/mapcatalog/topophoto/ Lunar & Planetary Institute]</em></p> | | <em>image from [http://www.lpi.usra.edu/resources/mapcatalog/topophoto/ Lunar & Planetary Institute]</em></p> |
− | <p>Lunar domes are small (typically having diameters less than 10-15 km) and squat (often less than 200 m high) so they are difficult to study. The [http://www.glrgroup.org/home.htm Geological Lunar Researches group] (GLR) is doing an excellent job in developing observational methods to determine the heights and slopes of domes, but for a few domes there is even better data. The Lunar Topophotomaps (LT) are like the more familiar (but less pronounceable) [http://www.lpod.org/archive/archive/2004/03/LPOD-2004-03-27.htm Lunar Topographic Orthophotomosaics] (LTO), but even larger scale. This piece of LT 61A2S1 (50) shows detailed topography for two domes just north of the Cauchy Rille in northern Mare Tranquillitatis. Vitruvius 1 (Grace) and Vitruvius 2 (Diana) are domes that seem to be seldom imaged; only the broad [http://www.lpod.org/archive/LPOD-2005-05-27.htm view] by Paolo Lazzarotti shows them, just at the end of Mons Esam. Grace is a classic hemispheric dome with diameter of 7.5 km and height of 150 m. The irregular crater on top is about 150 m wide and 80 m deep. On its steeper west flank Grace has a slope of 4.6°, but it is only 3.5° on the east. Diana is a smaller and less well-defined dome, with a basal diameter of about 4.2 by 5.3 km. Its summit pit is 1.1 by 1.8 km and is 190 m deep. This is amazing because Diana is only about 75 m high - the pit extends more than 100 m <i>below</i> the base of the dome! This probably results from the base of the dome being covered by mare basalt and even lava from the small dome to its south. The average slope of Diana’s inner pit wall is 21° - you wouldn’t want to fall! Perhaps this LPOD should be titled, Amazing Diana!</p> | + | <p>Lunar domes are small (typically having diameters less than 10-15 km) and squat (often less than 200 m high) so they are difficult to study. The [http://www.glrgroup.org/home.htm Geological Lunar Researches group] (GLR) is doing an excellent job in developing observational methods to determine the heights and slopes of domes, but for a few domes there is even better data. The Lunar Topophotomaps (LT) are like the more familiar (but less pronounceable) [[March_27,_2004|Lunar Topographic Orthophotomosaics]] (LTO), but even larger scale. This piece of LT 61A2S1 (50) shows detailed topography for two domes just north of the Cauchy Rille in northern Mare Tranquillitatis. Vitruvius 1 (Grace) and Vitruvius 2 (Diana) are domes that seem to be seldom imaged; only the broad [[May_27,_2005|view]] by Paolo Lazzarotti shows them, just at the end of Mons Esam. Grace is a classic hemispheric dome with diameter of 7.5 km and height of 150 m. The irregular crater on top is about 150 m wide and 80 m deep. On its steeper west flank Grace has a slope of 4.6°, but it is only 3.5° on the east. Diana is a smaller and less well-defined dome, with a basal diameter of about 4.2 by 5.3 km. Its summit pit is 1.1 by 1.8 km and is 190 m deep. This is amazing because Diana is only about 75 m high - the pit extends more than 100 m <i>below</i> the base of the dome! This probably results from the base of the dome being covered by mare basalt and even lava from the small dome to its south. The average slope of Diana’s inner pit wall is 21° - you wouldn’t want to fall! Perhaps this LPOD should be titled, Amazing Diana!</p> |
| <p>[mailto:tychocrater@yahoo.com Chuck Wood]</p> | | <p>[mailto:tychocrater@yahoo.com Chuck Wood]</p> |
| <p><b>Technical Details:</b><br /> | | <p><b>Technical Details:</b><br /> |
Line 13: |
Line 14: |
| Rükl plate 36<br /> | | Rükl plate 36<br /> |
| [http://www.lpi.usra.edu/resources/lunar_orbiter/images/img/iv_073_h2.jpg Lunar Orbiter IV view]</p> | | [http://www.lpi.usra.edu/resources/lunar_orbiter/images/img/iv_073_h2.jpg Lunar Orbiter IV view]</p> |
− | <p align="center"><b>SUPPORT LPOD - VISIT A SPONSOR (CLICK AN AD BELOW OR AT THE TOP)! </b><br /> | + | <p><b>Yesterday's LPOD:</b> [[March 26, 2006|The Brightest Taurid]] </p> |
− | <i>Now you can also support LPOD when you buy any book from Amazon thru [http://www.lpod.org/?page_id=102 LPOD!]</i></p> | + | <p><b>Tomorrow's LPOD:</b> [[March 29, 2006|Coincidence or Special Times?]] </p> |
| </div> | | </div> |
− | ---- | + | </div> |
− | ===COMMENTS?===
| + | <p> </p> |
− | Click on this icon [[image:PostIcon.jpg]] at the upper right to post a comment.
| + | <p> </p> |
| + | <p> </p> |
| + | <!-- End of content --> |
| + | {{wiki/ArticleFooter}} |